Step 1: 0 | Step 1: terbutalin as required |
Step 2: budesonide 100 µg twice daily | Step 2: formoterol 4.5 µg twice daily |
Step 3: budesonide 200 µg twice daily | Step 3: formoterol 9 µg twice daily |
Step 4: budesonide 400 µg twice daily | Step 4: formoterol 2×9 µg twice daily |
Step 5: budesonide 800 µg twice daily | |